Manufacture of sulfuric acid.



G. OPL. MANUPAQTUBE OP SULFUBIG AOID. APPLIOATIoN FILED 112.1, 1m.

1,012,421 f. Patented De. 19,1911.

Z-Z U6 77, for

normsrcrelsw: ,mma maman n c 'the latter the acid is sprayed into the top towers of the system to 66 B. and delivers a part of the acid so concentrated into the tank F through the conduit (f) while the remainder of the acid so concentrated flows through the conduit d, thence into the acid egg G,. From the acid egg the acid flows through the conduit el, and is nally atomized or sprayed in the upper part of the tower G.

The second tower Q of the system receives nitrous sulfuric acid from tower 5 through the conduit d5, the acid egg Gr5 and the conduit e5. Tower 2 partially denitrilies the acid and the same is then conveyed through the conduit (l2. the acid egg Gr2 and the conduit e2 to tower 5 wherein such acid'is sprayed or atomized. j

Tower 3 receives nitrous sulfuric acid from towel' 4 through the conduit d4, the acid egg G, and the conduit e, and from of tower 3 which tower partially denitries the acid and then discharges the same through a conduit d3 from which the acid flows into the acid egg Ggand through the conduit e3 and is sprayed or atomized in the top of tower 4.

Such water 'as may be necessary during the operation of the system is supplied through a conduit H which has branch pipes L, h2 and ha for feeding water into the towers 1 2 and 3, and the cnduit H also has branches @and 2 for feeding water into the connecting pipes E1 and The waste gases from the end of the system are discharged through a pipe L leading from tower 6. A

J"--Js represent lead boxes connected with the conduits (ZL-rl respectively for introducing the acid coming from the reaction towers into the corresponding acid eggs, Vwater and .nitric acid being also fed into the acid eggs through the said lead boxes. The tubesce6 leading from the separate acid eggs (1V- G6 respectively serve to convey `the acid mixture contained in the acid eggs up to the respective reaction towers and t'o allow the said mixture to reach the atomizers provided in the upper part of the reaction towers; the elevating o'r lifting of the acid mixture being effected by the pressure of the burner gases and air fed under pressure into the acid eggs by, the pump P, the tube p and the branch con- Fig. 2 of the drawings shows clearly the'connection of one of the acid eggs g* with the corresponding 'pipe conl duits. l

According to the present invention, the i acid is lifted into the towers not only by the compressed air, but also by the coml dopes of this patent may be obtained for ve cents pressed burner gases. Practice has demonstrated that where the acid is lifted into the towers exclusively by compressed air, there is not a sufiiciently intimate mixture of the burner gases with the nitrous sulfuric acid to insure a suiiiciently rapid oxidation of such gases. Such disadvantage, however, is obviated by the present inventionl in that the acid eggs which serve to raise the nitrous sulfuric acid into the reaction towers are actuated partly by compressed burner gases and partly y compressed air. During this operation, a certain percentage of the burner gases to be converted into sulfuric acid is driven under pressure into the acid e gs which serve to raise the acid instead ofeing conveyed in the usualmenner directly into the reaction towers. This part of the burner gases which is driven under pressure into the acid eggs will naturally become intimatel mixed with the nitrous sulfuric acid an will' therefore become rapidly oxidized with the result that there is a great increase in +he yield of sulfuric acid.

I claim as my invention:

1. The herein described improvement in the art of manufacturing sulfuric acid without lead chambers, which consists in passing the burner gases containing sulfur Ydioxid under'pressure into a system of reaction towers and producing a rapid circulation of nitrous sulfuric -acid through the system by feeding compressed burner gases and compressed air to the acideggs to raise the nitrous sulfuric acid into the towers and to come into intimate contact with the said acid. whereby oxidation-of the burner gases is effected. 'i

Q. The herein described improvement in the art of manufacturing sulfuric acid without lead chambers, which consists in assing burner gases containing sulfur dioxid through a system of reaction towers. raising nitrous sulfuric acid by acid eggs and atomizing such acid within the reaction towers, and conveying apart of the burner gases under pressure and also compressed air to the acideggs and causing such burner gases to assist in the raising of the nitrous sulfuric acid. and also to mix intimately witl1.such nitrous sulfuric acid whereby l such gases are oxidized.

In testimony whereof I have hereunto set my hand 1n presence of two subscribing witnesses. i

CARL OPL.

lVitnesses l .loser Rt't'scmu ROBERT lV. I-'Iifixcan'rx 1in.

each, by addressing the Commissioner of Patents Washington, D. G. i 

